Manufacture of metal-coated paper



produced according to the herein 'described process is therefore -a very efficient substitute for genuine leaf-gold, while at the same time it forms a paper for producing metalimpression, which is far superior tothe hitherto known paper for the same ob]ect.

By the utilization of the lus'tre preserving properties of the bitumen and the lngh melting point a metal impression paper may easily and cheaply be manufactured from a solution in a single opera-tion.

The prices of the bituminous substances from petroleum tar to asphalt are about one tenth of those for glue and one fortieth of those for shellac. i

In carrying out the invention 1t may be applied to all hitherto known processes for manufacturing metal-coated paper and the like.

S0 may, for instance, powdered metal (bronze) be stirred into a solution of Vulkabitumen in carbon tetrachloride or the like,

The employment of bitumen offers here also the advantage that a solvent is rendered entirely or partly unnecessary, whereby a cousiderable saving is effected. Owing to the high viscosity of melted Vulkaor other bitumen or bitumen mixed with very little solvent in the heated state the required film may be directly applied to the paper and the-metal powder may then be added by means of suitable apparatus.

' What I claim is:

l. As a new article' of manufacture a metal-coated paper whose surface consists of metal powder and a binder of bituminous substance.

2. As a new article of manufacture a polished metal-coated paper whose surface consists of -a metal powder and hard asphalt. Y

3. As a new article of manufacture a transfer paper having a metallic surface consisting of metal powder and bitumen of a high melting point.

In testimony whereof I affix my signature.

FRAU KATHARINA WlCKEL, geb. HOLECEK.

Witnesses:

ALEXANDER DE So'ro, ALBERT HALSTEAD. 

